Book letter opener



FIG. 1 is a front, top and right side perspective view of a book letter opener showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a back elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a right side elevational view thereof.

The dash-dot lines throughout the drawings are contour lines. 

I claim the ornamental design for a book letter opener, as shown and described. 